diff --git a/docker/tests/Dockerfile b/docker/tests/Dockerfile
index ded501a1d..a2abcb6af 100644
--- a/docker/tests/Dockerfile
+++ b/docker/tests/Dockerfile
@@ -1,7 +1,7 @@
 FROM elixir:latest
 LABEL maintainer="Thomas Citharel <tcit@tcit.fr>"
 
-ENV REFRESHED_AT=2019-04-24
+ENV REFRESHED_AT=2019-07-03
 RUN apt-get update -yq && apt-get install -yq build-essential inotify-tools postgresql-client git curl gnupg
 RUN curl -sL https://deb.nodesource.com/setup_10.x | bash && apt-get install nodejs -yq
 RUN npm install -g yarn
diff --git a/mix.exs b/mix.exs
index 1e8d12b32..49fa5f1e1 100644
--- a/mix.exs
+++ b/mix.exs
@@ -7,7 +7,7 @@ defmodule Mobilizon.Mixfile do
     [
       app: :mobilizon,
       version: @version,
-      elixir: "~> 1.8",
+      elixir: "~> 1.9",
       elixirc_paths: elixirc_paths(Mix.env()),
       compilers: [:phoenix, :gettext] ++ Mix.compilers(),
       start_permanent: Mix.env() == :prod,